OK ive read the information and still didn't help me.
if i download a trainer it costs me coins ? and if i run out i cannot download anymore ??
the coins are used to request trainer yet to be made , if a request get all the coins are required for it a trainer will be made.
"The following list of titles are currently up for trainer consideration. Each title has an assigned credit goal and once met it will be evaluated for a trainer. Click on any title to spend Reward Credits (RC) towards that game or for more options. There are currently over 200 MILLION unspent Reward Credits in the system."
any download not require coins the coins are only for requests